Youtube has all the piano preludes by Lena Auerbach - this is rather recent music (of the modern classical persuasion), and very accessible.

Some call her epigonal (as some of her stuff does indeed have a Shostakovich-esque sound), but I find this a bit unfair - there is a freshness and immediacy in her compositions (which she also performs herself) which marks it as today's music.

If you know Beethoven's Diabelli variations, you will get extra mileage out of Uri Caine's variations on the Diabelli variations (for piano and, unlike the original, orchestra). But they are an extremely fun piece to listen to even without knowing the predecessor.

For more "extremist" stuff, you want to go to Uri Caine's variations on the Goldberg variations, but they are orchestrated (and how! From techno to throatsingers to viola da gamba to lounge jazz ensemble) and thus not an answer to your request for new PIANO music specifically.

I seem today to be in a mood to answer a piano question with ensemble replies... so be it. Check out Tracy Silverman and Philip Aaberg (two "new-age" artists, very broadly and perhaps unfairly speaking) and their Three-Part Inventions album.

I'm a huge Uematsu fan, so I was a bit hesitant before playing something from his replacement, but it is fantastic. I'm about half way through this and contemplating trying to find some sheetmusic. On a side note (assuming you listen to Nobuo as well) it made me sad how later on he seemed to play the piano less and less. Like he was getting bored of it and just wanted more complex arrangements. Nice to see someone who isn't :)